Quote:
Originally Posted by Finite
Thanks guys, I'm a bit the wiser now. Still trying to assimilate some of that though.
So visually - let's use f/10 sct's as examples - if we have a 8" and a 16" side by side and focussed on the same celestial object, using different eyepieces to produce the same magnification in each scope, is the image going to be brighter in the larger scope than the 8", though the image is the same size in appearance (assuming the viewer has a healthy pupil dilation)?
I hope that makes some sense...?
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Yes! That is the advantage of aperture, gathering more photons which gives you a brighter and potentially more detailed image.
An object at 200X looks about the the same in every scope regardless of FR or aperture.
The eyepiece you would use to achieve 200X would differ from scope to scope based on the Focal length of the scope but the image size would be the same.